// lightbox_plus.js
// == written by Takuya Otani <takuya.otani@gmail.com> ===
// == Copyright (C) 2006 SimpleBoxes/SerendipityNZ Ltd. ==
/*
	Copyright (C) 2006 Takuya Otani/SimpleBoxes - http://serennz.cool.ne.jp/sb/
	Copyright (C) 2006 SerendipityNZ - http://serennz.cool.ne.jp/snz/
	
	This script is licensed under the Creative Commons Attribution 2.5 License
	http://creativecommons.org/licenses/by/2.5/
	
	basically, do anything you want, just leave my name and link.
*/
/*
	Original script : Lightbox JS : Fullsize Image Overlays
	Copyright (C) 2005 Lokesh Dhakar - http://www.huddletogether.com
	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/
*/
// ver. 20090729 - fixed a bug ( lightbox may not be closed properly )
// ver. 20090709 - fixed a bug ( loading image is not shown properly )
// ver. 20090707 - implemented animation feature
// ver. 20090318 - fixed a bug ( prev/next are not shown in some occasions )
// ver. 20061027 - fixed a bug ( not work at xhtml documents on Netscape7 )
// ver. 20061026 - fixed bugs
// ver. 20061010 - implemented image set feature
// ver. 20060921 - fixed a bug / added overall view
// ver. 20060920 - added flag to prevent mouse wheel event
// ver. 20060919 - fixed a bug
// ver. 20060918 - implemented functionality of wheel zoom & drag'n drop
// ver. 20060131 - fixed a bug to work correctly on Internet Explorer for Windows
// ver. 20060128 - implemented functionality of echoic word
// ver. 20060120 - implemented functionality of caption and close button
// === elements ===

/**************************************
    File modified for:
    Webutler V2.1 - www.webutler.de
    Copyright (c) 2008 - 2011
    Autor: Sven Zinke
    Free for any use
    Lizenz: GPL
**************************************/


var LightboxPlus_rootpath = '/Plugins/';

document.writeln('\n<link rel="stylesheet" type="text/css" href="' + LightboxPlus_rootpath + 'Lightbox/lightbox_plus.css" />');

document.getElemetsByClassName = function(name,target)
{
	var result = [];
	var object  = null;
	var search = new RegExp(['(^|\\s)',name,'(\\s|$)'].join(''));
	if (target && target.getElementsByTagName)
		object = target.getElementsByTagName('*');
	if (!object)
		object = document.getElementsByTagName ? document.getElementsByTagName('*') : document.all;
	for (var i=0,n=object.length;i<n;i++)
	{
		var check = object[i].getAttribute('class') || object[i].className;
		if (check.match(search)) result.push(object[i]);
	}
	return result;
}
// === window ===
function WindowSize()
{ // window size object
	this.w = 0;
	this.h = 0;
	return this;
}
WindowSize.prototype.update = function()
{
	var d = document;
	var w = 
	  (window.innerWidth) ? window.innerWidth
	: (d.documentElement && d.documentElement.clientWidth) ? d.documentElement.clientWidth
	: d.body.clientWidth;
	var h = 
	  (window.innerHeight) ? window.innerHeight
	: (d.documentElement && d.documentElement.clientHeight) ? d.documentElement.clientHeight
	: d.body.clientHeight;
	if (w != this.w || h != this.h)
	{
		this.w = w;
		this.h = h;
		return true;
	}
	return false;
};
function PageSize()
{ // page size object
	this.win = new WindowSize();
	this.w = 0;
	this.h = 0;
	return this;
}
PageSize.prototype.update = function()
{
	var d = document;
	var w = 
	  (window.innerWidth && window.scrollMaxX) ? window.innerWidth + window.scrollMaxX
	: (d.body.scrollWidth > d.body.offsetWidth) ? d.body.scrollWidth
	: d.body.offsetWidt;
	var h = 
	  (window.innerHeight && window.scrollMaxY) ? window.innerHeight + window.scrollMaxY
	: (d.body.scrollHeight > d.body.offsetHeight) ? d.body.scrollHeight
	: d.body.offsetHeight;
	var updated = this.win.update();
	if (w < this.win.w) w = this.win.w;
	if (h < this.win.h) h = this.win.h;
	if (updated || w != this.w || h != this.h)
	{
		this.w = w;
		this.h = h;
		return true;
	}
	return false;
};
function PagePos()
{ // page position object
	this.x = 0;
	this.y = 0;
	return this;
}
PagePos.prototype.update = function()
{
	var d = document;
	var x =
	  (window.pageXOffset) ? window.pageXOffset
	: (d.documentElement && d.documentElement.scrollLeft) ? d.documentElement.scrollLeft
	: (d.body) ? d.body.scrollLeft
	: 0;
	var y =
	  (window.pageYOffset) ? window.pageYOffset
	: (d.documentElement && d.documentElement.scrollTop) ? d.documentElement.scrollTop
	: (d.body) ? d.body.scrollTop
	: 0;
	if (x != this.x || y != this.y)
	{
		this.x = x;
		this.y = y;
		return true;
	}
	return false;
};
// === browser ===
if ( !window.Spica )
{
	var Spica = {};
	Spica.Browser = new function()
	{
		this.name = navigator.userAgent;
		this.isWinIE = this.isMacIE = false;
		this.isGecko = this.name.match(/Gecko\//);
		this.isSafari = this.name.match(/AppleWebKit/);
		this.isSafari3 = (this.name.match(/AppleWebKit\/(\d\d\d)/) && parseInt(RegExp.$1) > 500);
		this.isKHTML = this.isSafari || navigator.appVersion.match(/Konqueror|KHTML/);
		this.isOpera = window.opera;
		if (document.all && !this.isGecko && !this.isSafari && !this.isOpera)
		{
			this.isWinIE = this.name.match(/Win/);
			this.isMacIE = this.name.match(/Mac/);
			this.isNewIE = (this.name.match(/MSIE (\d\.\d)/) && RegExp.$1 > 6.5);
		}
	};
	Spica.Event = {
		cache : false,
		getEvent : function(evnt)
		{
			return (evnt) ? evnt : ((window.event) ? window.event : null);
		},
		getKey : function(evnt)
		{
			if (!evnt) return; // do nothing
			return (evnt.keyCode) ? evnt.keyCode : evnt.charCode;
		},
		stop : function(evnt)
		{
			if (!evnt) return; // do nothing
			try
			{
				evnt.stopPropagation();
			}
			catch(err) {};
			evnt.cancelBubble = true;
			try
			{
				evnt.preventDefault();
			}
			catch(err) {};
			return (evnt.returnValue = false);
		},
		register : function(object, type, handler)
		{
			if (!object) return;
			if (type == 'keypress' && !object.addEventListener) type = 'keydown';
			if (type == 'mousewheel' && Spica.Browser.isGecko) type = 'DOMMouseScroll';
			if (!this.cache) this.cache = [];
			if (object.addEventListener)
			{
				this.cache.push([object,type,handler]);
				object.addEventListener(type, handler, false);
			}
			else if (object.attachEvent)
			{
				this.cache.push([object,type,handler]);
				object.attachEvent('on' + type,handler);
			}
			else
			{
				object['on' + type] = handler;
			}
		},
		deregister : function(object, type, handler)
		{
			if (!object) return;
			if (type == 'keypress' && !object.addEventListener) type = 'keydown';
			if (type == 'mousewheel' && Spica.Browser.isGecko) type = 'DOMMouseScroll';
			if (object.removeEventListener)
				object.removeEventListener(type, handler, false);
			else if (object.detachEvent)
				object.detachEvent('on' + type, handler);
			else
				object['on' + type] = null;
		},
		deregisterAll : function()
		{
			if (!Spica.Event.cache) return
			for (var i=0,n=Spica.Event.cache.length;i<n;i++)
			{
				Spica.Event.deregister(Spica.Event.cache[i]);
				Spica.Event.cache[i][0] = null;
			}
			Spica.Event.cache = false;
		},
		run : function(func)
		{
			if (typeof func != 'function') return;
			(Spica.Browser.isGecko || Spica.Browser.isOpera)
				? this.register(window,'DOMContentLoaded',func)
				: this.register(window,'load',func);
		}
	};
	Spica.Event.register(window, 'unload', Spica.Event.deregisterAll);
} // end of if ( !window.Spica )
// === lightbox ===
function Lightbox(option)
{
	var self = this;
	self._imgs = new Array();
	self._sets = new Array();
	self._wrap = null;
	self._box  = null;
	self._img  = null;
	self._open = -1;
	self._page = new PageSize();
	self._pos  = new PagePos();
	self._zoomimg = null;
	self._expandable = false;
	self._expanded = false;
	self._funcs = {'move':null,'up':null,'drag':null,'wheel':null,'dbl':null};
	self._level = 1;
	self._curpos = {x:0,y:0};
	self._imgpos = {x:0,y:0};
	self._minpos = {x:0,y:0};
	self._expand = option.expandimg;
	self._shrink = option.shrinkimg;
	self._blank = option.blankimg;
	self._resizable = option.resizable;
	self._timer = null;
	self._anim = {step:0, w:50, h:50, a:0, t:0, f:option.animation};
	self._indicator = null;
	self._overall = null;
	self._openedset = null;
	self._prev = null;
	self._next = null;
	self._hiding = [];
	self._first = false;
	self._changed = false;
	self._scroll = option.scroll;
	return self._init(option);
}
Lightbox.prototype = {
    refresh: function (target) {
        if (!target) target = document;
        this._imgs.length = 0;
        this._genListFromLinks(target);
    },
    _init: function (option) {
        var self = this;
        var d = document;
        if (!d.getElementsByTagName) return;
        if (Spica.Browser.isMacIE) return self;
        var body = d.getElementsByTagName("body")[0];
        self._wrap = self._createWrapOn(body);
        self._box = self._createBoxOn(body, option);
        self._img = self._box.firstChild;
        self._zoomimg = d.getElementById('actionImage');
        if (!option.skipInit) self._genListFromLinks(d);
        return self;
    },
    _genListFromLinks: function (d) {
        var self = this;
        var links = d.getElementsByTagName("a");
        for (var i = 0; i < links.length; i++) {
            var anchor = links[i];
            var num = self._imgs.length;
            var rel = String(anchor.getAttribute("rel")).toLowerCase();
            if (!anchor.getAttribute("href") || !rel.match('lightbox')) continue;
            // initialize item
            self._imgs[num] = {
                src: anchor.getAttribute("href"),
                w: -1,
                h: -1,
                alt: '',
                cls: anchor.className,
                set: rel
            };
            if (anchor.getAttribute("alt"))
                self._imgs[num].alt = anchor.getAttribute("alt");
            else if (anchor.firstChild
			       && anchor.firstChild.getAttribute
			       && anchor.firstChild.getAttribute("alt"))
                self._imgs[num].alt = anchor.firstChild.getAttribute("alt");
            anchor.onclick = self._genOpener(num); // set closure to onclick event
            if (rel != 'lightbox') {
                if (!self._sets[rel]) self._sets[rel] = new Array();
                self._sets[rel].push(num);
            }
        }
    },
    _genOpener: function (num) {
        var self = this;
        return function () { self._show(num); return false; }
    },
    _createWrapOn: function (obj) {
        var self = this;
        if (!obj) return null;
        // create wrapper object, translucent background
        var wrap = document.createElement('div');
        obj.appendChild(wrap);
        wrap.id = 'overlay';
        wrap.style.display = 'none';
        wrap.style.position = 'fixed';
        wrap.style.top = '0px';
        wrap.style.left = '0px';
        wrap.style.zIndex = '150';
        wrap.style.width = '100%';
        wrap.style.height = '100%';
        if (Spica.Browser.isWinIE) wrap.style.position = 'absolute';
        Spica.Event.register(wrap, "click", function (evt) { self._close(evt); });
        return wrap;
    },
    _createBoxOn: function (obj, option) {
        var self = this;
        if (!obj) return null;
        // create lightbox object, frame rectangle
        var box = document.createElement('div');
        obj.appendChild(box);
        box.id = 'lightbox';
        box.style.display = 'none';
        box.style.position = 'absolute';
        box.style.zIndex = '160';
        // create image object to display a target image
        var img = document.createElement('img');
        box.appendChild(img);
        img.id = 'lightboxImage';
        img.width = 200;
        img.height = 200;
        self._set_cursor(img);
        Spica.Event.register(img, 'mouseover', function () { self._show_action(); });
        Spica.Event.register(img, 'mouseout', function () { self._hide_action(); });
        Spica.Event.register(img, 'click', function (evt) { self._close(evt); });
        //wiget shared soc
        var divsoc = document.createElement('div');
        divsoc.id = 'divsoc';
        box.appendChild(divsoc);
        var widget = document.createElement('div');
        widget.setAttribute('class', 'addthis_sharing_toolbox');
        divsoc.appendChild(widget);
        // create loading image, animated image
        var imag = new Image;
        imag.onload = function () {
            var spin = document.createElement('img');
            box.appendChild(spin);
            spin.id = 'loadingImage';
            spin.src = imag.src;
            spin.style.position = 'absolute';
            spin.style.zIndex = '170';
            self._set_cursor(spin);
            Spica.Event.register(spin, 'click', function (evt) { self._close(evt); });
            imag.onload = function () { };
        };
        if (option.loadingimg != '') imag.src = option.loadingimg;
        // create hover navi - prev
        if (option.previmg) {
            var prevLink = document.createElement('img');
            box.appendChild(prevLink);
            prevLink.id = 'prevLink';
            prevLink.style.display = 'none';
            prevLink.style.position = 'absolute';
            prevLink.style.left = '9px';
            prevLink.style.zIndex = '190';
            prevLink.src = option.previmg;
            self._prev = prevLink;
            Spica.Event.register(prevLink, 'mouseover', function () { self._show_action(); });
            Spica.Event.register(prevLink, 'click', function () { self._show_next(-1); });
        }
        // create hover navi - next
        if (option.nextimg) {
            var nextLink = document.createElement('img');
            box.appendChild(nextLink);
            nextLink.id = 'nextLink';
            nextLink.style.display = 'none';
            nextLink.style.position = 'absolute';
            nextLink.style.right = '9px';
            nextLink.style.zIndex = '190';
            nextLink.src = option.nextimg;
            self._next = nextLink;
            Spica.Event.register(nextLink, 'mouseover', function () { self._show_action(); });
            Spica.Event.register(nextLink, 'click', function () { self._show_next(+1); });
        }
        // create zoom indicator
        var zoom = document.createElement('img');
        box.appendChild(zoom);
        zoom.id = 'actionImage';
        zoom.style.display = 'none';
        zoom.style.position = 'absolute';
        zoom.style.top = '15px';
        zoom.style.left = '15px';
        zoom.style.zIndex = '170';
        self._set_cursor(zoom);
        zoom.src = self._expand;
        Spica.Event.register(zoom, 'mouseover', function () { self._show_action(); });
        Spica.Event.register(zoom, 'click', function () { self._zoom(); });
        // create close button
        if (option.closeimg) {
            var btn = document.createElement('img');
            box.appendChild(btn);
            btn.id = 'closeButton';
            btn.style.display = 'inline';
            btn.style.position = 'absolute';
            btn.style.right = '9px';
            btn.style.top = '10px';
            btn.style.zIndex = '180';
            btn.src = option.closeimg;
            self._set_cursor(btn);
            Spica.Event.register(btn, 'click', function (evt) { self._close(evt); });
        }
        // caption text
        var caption = document.createElement('span');
        box.appendChild(caption);
        caption.id = 'lightboxCaption';
        caption.style.display = 'none';
        caption.style.position = 'absolute';
        caption.style.zIndex = '180';
        // create effect image
        if (!option.effectpos)
            option.effectpos = { x: 0, y: 0 };
        else {
            if (option.effectpos.x == '') option.effectpos.x = 0;
            if (option.effectpos.y == '') option.effectpos.y = 0;
        }
        var effect = new Image;
        effect.onload = function () {
            var effectImg = document.createElement('img');
            box.appendChild(effectImg);
            effectImg.id = 'effectImage';
            effectImg.src = effect.src;
            if (option.effectclass) effectImg.className = option.effectclass;
            effectImg.style.position = 'absolute';
            effectImg.style.display = 'none';
            effectImg.style.left = [option.effectpos.x, 'px'].join(''); ;
            effectImg.style.top = [option.effectpos.y, 'px'].join('');
            effectImg.style.zIndex = '190';
            self._set_cursor(effectImg);
            Spica.Event.register(effectImg, 'click', function () { effectImg.style.display = 'none'; });
        };
        if (option.effectimg != '') effect.src = option.effectimg;
        if (self._resizable) {
            var overall = document.createElement('div');
            obj.appendChild(overall);
            overall.id = 'lightboxOverallView';
            overall.style.display = 'none';
            overall.style.position = 'absolute';
            overall.style.zIndex = '170';
            self._overall = overall;
            var indicator = document.createElement('div');
            obj.appendChild(indicator);
            indicator.id = 'lightboxIndicator';
            indicator.style.display = 'none';
            indicator.style.position = 'absolute';
            indicator.style.zIndex = '180';
            self._indicator = indicator;
        }
        return box;
    },
    _set_photo_size: function () {
        var self = this;
        if (self._open == -1) return;
        var targ = { w: self._page.win.w - 30, h: self._page.win.h - 30 };
        var zoom = { x: 15, y: 15 };
        var navi = { p: 9, n: 9, y: 0 };
        if (!self._expanded) { // shrink image with the same aspect
            var orig = { w: self._imgs[self._open].w, h: self._imgs[self._open].h };
            if (orig.w < 0) orig.w = self._img.width;
            if (orig.h < 0) orig.h = self._img.height;
            var ratio = 1.0;
            if ((orig.w >= targ.w || orig.h >= targ.h) && orig.h && orig.w)
                ratio = ((targ.w / orig.w) < (targ.h / orig.h)) ? targ.w / orig.w : targ.h / orig.h;
            self._expandable = (ratio < 1.0) ? true : false;
            self._anim.w = Math.floor(orig.w * ratio);
            self._anim.h = Math.floor(orig.h * ratio);
            if (self._resizable) self._expandable = true;
            if (Spica.Browser.isWinIE) self._box.style.display = "block";
            self._imgpos.x = self._pos.x + (targ.w - self._img.width) / 2;
            self._imgpos.y = self._pos.y + (targ.h - self._img.height) / 2;
            navi.y = Math.floor(self._img.height / 2) - 10;
            self._show_overall(false);
            var loading = document.getElementById('loadingImage');
            if (loading) {
                loading.style.left = [(self._img.width - 30) / 2, 'px'].join('');
                loading.style.top = [(self._img.height - 30) / 2, 'px'].join('');
            }
        }
        else { // zoomed or actual sized image
            var width = parseInt(self._imgs[self._open].w * self._level);
            var height = parseInt(self._imgs[self._open].h * self._level);
            self._minpos.x = self._pos.x + targ.w - self._img.width;
            self._minpos.y = self._pos.y + targ.h - self._img.height;
            if (self._img.width <= targ.w)
                self._imgpos.x = self._pos.x + (targ.w - self._img.width) / 2;
            else {
                if (self._imgpos.x > self._pos.x) self._imgpos.x = self._pos.x;
                else if (self._imgpos.x < self._minpos.x) self._imgpos.x = self._minpos.x;
                zoom.x = 15 + self._pos.x - self._imgpos.x;
                navi.p = self._pos.x - self._imgpos.x - 5;
                navi.n = self._img.width - self._page.win.w + self._imgpos.x + 25;
                if (Spica.Browser.isWinIE) navi.n -= 10;
            }
            if (self._img.height <= targ.h) {
                self._imgpos.y = self._pos.y + (targ.h - self._img.height) / 2;
                navi.y = Math.floor(self._img.height / 2) - 10;
            }
            else {
                if (self._imgpos.y > self._pos.y) self._imgpos.y = self._pos.y;
                else if (self._imgpos.y < self._minpos.y) self._imgpos.y = self._minpos.y;
                zoom.y = 15 + self._pos.y - self._imgpos.y;
                navi.y = Math.floor(targ.h / 2) - 10 + self._pos.y - self._imgpos.y;
            }
            self._anim.w = width;
            self._anim.h = height;
            self._show_overall(true);
        }
        self._box.style.left = [self._imgpos.x, 'px'].join('');
        self._box.style.top = [self._imgpos.y, 'px'].join('');
        self._zoomimg.style.left = [zoom.x, 'px'].join('');
        self._zoomimg.style.top = [zoom.y, 'px'].join('');
        self._wrap.style.left = self._pos.x;
        if (self._prev && self._next) {
            self._prev.style.left = [navi.p, 'px'].join('');
            self._next.style.right = [navi.n, 'px'].join('');
            self._prev.style.top = self._next.style.top = [navi.y, 'px'].join('');
        }
        self._changed = true;
    },
    _show_overall: function (visible) {
        var self = this;
        if (self._overall == null) return;
        if (visible) {
            if (self._open == -1) return;
            var base = 100;
            var outer = { w: 0, h: 0, x: 0, y: 0 };
            var inner = { w: 0, h: 0, x: 0, y: 0 };
            var orig = { w: self._img.width, h: self._img.height };
            var targ = { w: self._page.win.w - 30, h: self._page.win.h - 30 };
            var max = orig.w;
            if (max < orig.h) max = orig.h;
            if (max < targ.w) max = targ.w;
            if (max < targ.h) max = targ.h;
            if (max < 1) return;
            outer.w = parseInt(orig.w / max * base);
            outer.h = parseInt(orig.h / max * base);
            inner.w = parseInt(targ.w / max * base);
            inner.h = parseInt(targ.h / max * base);
            outer.x = self._pos.x + targ.w - base - 20;
            outer.y = self._pos.y + targ.h - base - 20;
            inner.x = outer.x - parseInt((self._imgpos.x - self._pos.x) / max * base);
            inner.y = outer.y - parseInt((self._imgpos.y - self._pos.y) / max * base);
            self._overall.style.left = [outer.x, 'px'].join('');
            self._overall.style.top = [outer.y, 'px'].join('');
            self._overall.style.width = [outer.w, 'px'].join('');
            self._overall.style.height = [outer.h, 'px'].join('');
            self._indicator.style.left = [inner.x, 'px'].join('');
            self._indicator.style.top = [inner.y, 'px'].join('');
            self._indicator.style.width = [inner.w, 'px'].join('');
            self._indicator.style.height = [inner.h, 'px'].join('');
            self._overall.style.display = 'block'
            self._indicator.style.display = 'block';
        }
        else {
            self._overall.style.display = 'none';
            self._indicator.style.display = 'none';
        }
    },
    _set_size: function (onResize) {
        var self = this;
        if (self._open == -1) return;
        if (!self._page.update() && !self._pos.update() && !self._changed) return;
        if (Spica.Browser.isWinIE) {
            self._wrap.style.width = [self._page.win.w, 'px'].join('');
            self._wrap.style.height = [self._page.win.h, 'px'].join('');
            self._wrap.style.top = [self._pos.y, 'px'].join('');
        }
        if (onResize) self._set_photo_size();
    },
    _set_cursor: function (obj) {
        var self = this;
        if (Spica.Browser.isWinIE && !Spica.Browser.isNewIE) return;
        obj.style.cursor = 'pointer';
    },
    _current_setindex: function () {
        var self = this;
        if (!self._openedset) return -1;
        var list = self._sets[self._openedset];
        for (var i = 0, n = list.length; i < n; i++) {
            if (list[i] == self._open) return i;
        }
        return -1;
    },
    _get_setlength: function () {
        var self = this;
        if (!self._openedset) return -1;
        return self._sets[self._openedset].length;
    },
    _show_action: function () {
        var self = this;
        if (self._open == -1) return;
        var check = self._current_setindex();
        if (check > -1) {
            if (check > 0) self._prev.style.display = 'inline';
            if (check < self._get_setlength() - 1) self._next.style.display = 'inline';
        }
        if (!self._expandable || !self._zoomimg) return;
        self._zoomimg.src = (self._expanded) ? self._shrink : self._expand;
        self._zoomimg.style.display = 'inline';
        //document.body.style.overflow = 'hidden';
    },
    _hide_action: function () {
        var self = this;
        if (self._zoomimg) self._zoomimg.style.display = 'none';
        if (self._open > -1 && self._expanded) self._dragstop(null);
        if (self._prev) self._prev.style.display = 'none';
        if (self._next) self._next.style.display = 'none';
        //document.body.style.overflow = 'visible';
    },
    _zoom: function () {
        var self = this;
        var closeBtn = document.getElementById('closeButton');
        if (self._expanded) {
            self._reset_func();
            self._expanded = false;
            if (closeBtn) closeBtn.style.display = 'inline';
        }
        else if (self._open > -1) {
            self._level = 1;
            self._imgpos.x = self._pos.x;
            self._imgpos.y = self._pos.y;
            self._expanded = true;
            self._funcs.drag = function (evt) { self._dragstart(evt) };
            self._funcs.dbl = function (evt) { self._close(null) };
            if (self._resizable) {
                self._funcs.wheel = function (evt) { self._onwheel(evt) };
                Spica.Event.register(self._box, 'mousewheel', self._funcs.wheel);
            }
            Spica.Event.register(self._img, 'mousedown', self._funcs.drag);
            Spica.Event.register(self._img, 'dblclick', self._funcs.dbl);
            self._show_caption(false);
            if (closeBtn) closeBtn.style.display = 'none';
        }
        self._set_photo_size();
        self._show_action();
    },
    _reset_func: function () {
        var self = this;
        if (self._funcs.wheel != null) Spica.Event.deregister(self._box, 'mousewheel', self._funcs.wheel);
        if (self._funcs.move != null) Spica.Event.deregister(self._img, 'mousemove', self._funcs.move);
        if (self._funcs.up != null) Spica.Event.deregister(self._img, 'mouseup', self._funcs.up);
        if (self._funcs.drag != null) Spica.Event.deregister(self._img, 'mousedown', self._funcs.drag);
        if (self._funcs.dbl != null) Spica.Event.deregister(self._img, 'dblclick', self._funcs.dbl);
        self._funcs = { 'move': null, 'up': null, 'drag': null, 'wheel': null, 'dbl': null };
    },
    _onwheel: function (evt) {
        var self = this;
        var delta = 0;
        evt = Spica.Event.getEvent(evt);
        if (evt.wheelDelta) delta = event.wheelDelta / -120;
        else if (evt.detail) delta = evt.detail / 3;
        if (Spica.Browser.isOpera) delta = -delta;
        var step =
			  (self._level < 1) ? 0.1
			: (self._level < 2) ? 0.25
			: (self._level < 4) ? 0.5
			: 1;
        self._level = (delta > 0) ? self._level + step : self._level - step;
        if (self._level > 8) self._level = 8;
        else if (self._level < 0.5) self._level = 0.5;
        self._set_photo_size();
        return Spica.Event.stop(evt);
    },
    _dragstart: function (evt) {
        var self = this;
        evt = Spica.Event.getEvent(evt);
        self._curpos.x = evt.screenX;
        self._curpos.y = evt.screenY;
        self._funcs.move = function (evnt) { self._dragging(evnt); };
        self._funcs.up = function (evnt) { self._dragstop(evnt); };
        Spica.Event.register(self._img, 'mousemove', self._funcs.move);
        Spica.Event.register(self._img, 'mouseup', self._funcs.up);
        return Spica.Event.stop(evt);
    },
    _dragging: function (evt) {
        var self = this;
        evt = Spica.Event.getEvent(evt);
        self._imgpos.x += evt.screenX - self._curpos.x;
        self._imgpos.y += evt.screenY - self._curpos.y;
        self._curpos.x = evt.screenX;
        self._curpos.y = evt.screenY;
        self._set_photo_size();
        return Spica.Event.stop(evt);
    },
    _dragstop: function (evt) {
        var self = this;
        evt = Spica.Event.getEvent(evt);
        if (self._funcs.move != null) Spica.Event.deregister(self._img, 'mousemove', self._funcs.move);
        if (self._funcs.up != null) Spica.Event.deregister(self._img, 'mouseup', self._funcs.up);
        self._funcs.move = null;
        self._funcs.up = null;
        self._set_photo_size();
        return (evt) ? Spica.Event.stop(evt) : false;
    },
    _show_caption: function (enable) {
        var self = this;
        var caption = document.getElementById('lightboxCaption');
        if (!caption) return;
        if (caption.innerHTML.length == 0 || !enable) {
            caption.style.display = 'none';
        }
        else { // now display caption
            caption.style.top = [self._img.height - 28, 'px'].join(''); // 10 is top margin of lightbox
            caption.style.left = '10px';
            caption.style.width = [self._img.width, 'px'].join(''); // 20 is total side margin of lightbox
            caption.style.display = 'block';
        }
    },
    _toggle_wrap: function (flag) {
        var self = this;
        self._wrap.style.display = flag ? "block" : "none";
        if (self._hiding.length == 0 && !self._first) { // some objects may overlap on overlay, so we hide them temporarily.
            var tags = ['select', 'embed', 'object'];
            for (var i = 0, n = tags.length; i < n; i++) {
                var elem = document.getElementsByTagName(tags[i]);
                for (var j = 0, m = elem.length; j < m; j++) { // check the original value at first. when already hidden, dont touch them
                    var check = elem[j].style.visibility;
                    if (!check) {
                        if (elem[j].currentStyle)
                            check = elem[j].currentStyle['visibility'];
                        else if (document.defaultView)
                            check = document.defaultView.getComputedStyle(elem[j], '').getPropertyValue('visibility');
                    }
                    if (check == 'hidden') continue;
                    self._hiding.push(elem[j]);
                }
            }
            self._first = true;
        }
        for (var i = 0, n = self._hiding.length; i < n; i++)
            self._hiding[i].style.visibility = flag ? "hidden" : "visible";
        if (flag)
            self._setOpacity(self._wrap, 5);
    },
    _prepare: function (num) {
        var self = this;
        if (self._open == -1) return;
        self._set_size(false); // calc and set wrapper size
        self._toggle_wrap(true);
        self._box.style.display = "block";
        self._hide_action();
        self._img.src = self._blank;
        var loading = document.getElementById('loadingImage');
        if (loading) loading.style.display = 'inline';
        var objs = ['effectImage', 'closeButton', 'lightboxCaption'];
        for (var i in objs) {
            var obj = document.getElementById(objs[i]);
            if (obj) obj.style.display = 'none';
        }
    },
    _show: function (num) {
        var d = document;
        var self = this;
        var imag = new Image;
        if (num < 0 || num >= self._imgs.length) return;
        self._open = num; // set opened image number
        self._prepare();
        self._set_photo_size();
        imag.onload = function () {
            self._expanded = false;
            if (self._imgs[self._open].w == -1) { // store original image width and height
                self._imgs[self._open].w = imag.width;
                self._imgs[self._open].h = imag.height;
            }
            var caption = document.getElementById('lightboxCaption');
            if (caption)
                try { caption.innerHTML = self._imgs[self._open].alt; } catch (e) { }
            self._anim.t = (new Date()).getTime();
            self._timer = window.setInterval(function () { self._run() }, 100);
            self._img.setAttribute('alt', self._imgs[self._open].alt);
            self._anim.step = (self._anim.f) ? 0 : 2;
            self._set_photo_size(); // calc and set lightbox size
            if (!self._anim.f) // animator is disabled, so apply immediately
                self._show_image();
            if (self._imgs[self._open].set != 'lightbox') {
                var set = self._imgs[self._open].set;
                if (self._sets[set].length > 1) self._openedset = set;
                if (!self._prev || !self._next) self._openedset = null;
            }
        };
        self._expandable = false;
        self._expanded = false;
        self._anim.step = -1;
        imag.src = self._imgs[self._open].src;
        if (self._scroll == false)
            d.body.style.overflow = 'hidden';
    },
    _run: function () {
        var self = this;
        var t = (new Date()).getTime();
        if (t - self._anim.t < 50) return;
        self._anim.t = t;
        self._set_size(true);
        var imgIsPNG = false;
        var fileExt = self._img.src.substring(self._img.src.length - 3, self._img.src.length);
        fileExt = fileExt.toLowerCase();
        if (fileExt == 'png') imgIsPNG = true;
        if (self._anim.step == 0 || self._anim.w != self._img.width || self._anim.h != self._img.height) {
            self._doResizing();
        }
        else if (self._anim.step == 1) {
            if (Spica.Browser.isWinIE && imgIsPNG == true) {
                self._img.style.filter = '';
            }
            else {
                self._doFadeIn();
            }
        }
        else if (self._anim.step == 3) {
            if (Spica.Browser.isWinIE && imgIsPNG == true) {
                self._img.style.filter = '';
            }
            else {
                self._doFadeOut();
            }
        }
    },
    _show_image: function () {
        var self = this;
        if (self._open == -1) return;
        self._img.src = self._imgs[self._open].src;
        var loading = document.getElementById('loadingImage');
        if (loading) loading.style.display = 'none';
        var effect = document.getElementById('effectImage');
        if (effect && (!effect.className || self._imgs[self._open].cls == effect.className))
            effect.style.display = 'block';
        var closeBtn = document.getElementById('closeButton');
        if (closeBtn) closeBtn.style.display = 'inline';
        self._show_caption(true);
    },
    _doResizing: function () {
        var self = this;
        var diff = {
            x: (self._anim.f) ? Math.floor((self._anim.w - self._img.width) / 3) : 0,
            y: (self._anim.f) ? Math.floor((self._anim.h - self._img.height) / 3) : 0
        };
        self._img.width += diff.x;
        self._img.height += diff.y;
        if (Math.abs(diff.x) < 1) self._img.width = self._anim.w;
        if (Math.abs(diff.y) < 1) self._img.height = self._anim.h;
        if (self._anim.w == self._img.width && self._anim.h == self._img.height) {
            self._changed = false;
            self._set_photo_size();
            if (self._anim.step == 0) {
                self._anim.step = 1; // move on the next stage
                self._anim.a = 0;
                self._show_image();
                self._setOpacity(self._img, self._anim.a);
            }
            else if (self._anim.step == 2 && !self._expanded)
                self._show_caption(true);
        }
    },
    _doFadeIn: function () {
        var self = this;
        self._anim.a += 2;
        if (self._anim.a > 10) {
            self._anim.step = 2; // move on the next stage
            self._anim.a = 9.9;
        }
        self._setOpacity(self._img, self._anim.a);
    },
    _doFadeOut: function () {
        var self = this;
        self._anim.a -= 1;
        if (self._anim.a < 1) {
            self._anim.step = 2; // finish
            self._anim.a = 0;
            if (self._timer != null) {
                window.clearInterval(self._timer);
                self._timer = null;
            }
            self._toggle_wrap(false);
        }
        self._setOpacity(self._wrap, self._anim.a);
    },
    _setOpacity: function (elem, alpha) {
        if (Spica.Browser.isWinIE)
            elem.style.filter = 'alpha(opacity=' + (alpha * 10) + ')';
        else
            elem.style.opacity = alpha / 10;
    },
    _close_box: function () {
        var self = this;
        var d = document;
        self._open = -1;
        //self._openedset = null;
        self._hide_action();
        self._reset_func();
        self._show_overall(false);
        self._box.style.display = "none";
        if (!self._anim.f && self._timer != null) {
            window.clearInterval(self._timer);
            self._timer = null;
        }
        d.body.style.overflow = 'visible';
    },
    _show_next: function (direction) {
        var self = this;
        if (!self._openedset) return self._close(null);
        var index = self._current_setindex() + direction;
        var targ = self._sets[self._openedset][index];
        self._close_box();
        self._show(targ);
    },
    _close: function (evt) {
        var self = this;
        if (evt != null) {
            evt = Spica.Event.getEvent(evt);
            var targ = evt.target || evt.srcElement;
            if (targ && targ.getAttribute('id') == 'lightboxImage' && self._expanded) return;
        }
        self._close_box();
        if (self._anim.f && self._anim.step == 2) {
            self._anim.step = 3;
            self._anim.a = 5;
        }
        else {
            self._toggle_wrap(false);
        }
    }
};
Spica.Event.run(function() {
    var loading;
	if (Spica.Browser.isWinIE) loading = 'loading.gif';
    else loading = 'loading.png';
	var lightbox = new Lightbox({
		loadingimg : LightboxPlus_rootpath + 'lightbox/' + loading,
		expandimg : LightboxPlus_rootpath + 'lightbox/expand.gif',
		shrinkimg : LightboxPlus_rootpath + 'lightbox/shrink.gif',
		blankimg : LightboxPlus_rootpath + 'lightbox/blank.gif',
		previmg : LightboxPlus_rootpath + 'lightbox/prev.png',
		nextimg : LightboxPlus_rootpath + 'lightbox/next.png',
		closeimg : LightboxPlus_rootpath + 'lightbox/close.png',
		effectimg : '', //LightboxPlus_rootpath + 'lightbox/zzoop.gif'
		effectpos : {x:-40,y:-20},
		effectclass : '', //effectable
		resizable : true,
		animation: true,
        scroll: true
	});
});
